Orlando — Sherwin-Williams has added a new deep base matte flat sheen to its Builders Solution Interior Topcoat. The new, matte flat deep base finish, flatter than the flat finish, offers the same durability, washability and burnish-resistance even when bold, vivid accent colors are used, the company reports. Builders Solution Topcoat now carries Sherwin-Williams proprietary GreenSure designation and has earned the Good Housekeeping Seal. Builders Solution Topcoat is part of the Builders Solution System, which includes a Surfacer that minimizes drywall imperfections. www.sherwin-williams.com .